Mono-Ethanol-Amine (MEA) solvent has been widely used in the Carbon Capture industry. However, it has some drawbacks (e.g. it requires an extensive amount of energy for regeneration, the CAPEX of the plant operating with MEA is high etc.). Thus, a more promising solvent CESAR 1, an aqueous solution of 2-amino-2-methyl-propanol (AMP) and piperazine (PZ), from CESAR project has been studied to overcome these drawbacks. In this study, the performance of CESAR 1 solvent in Post-combustion Carbon Capture Plant has been evaluated in technical and economical point of view with respect to simple yet well-studied aqueous solvent MEA. The Process has been modelled in a process simulation software called ProMax, V6 (Bryan Research & Engineering). Pilot plant studies have been performed, and bigger scale production with real flue gas data was studied. Six parameter sensitivity analysis was performed, and the most significant reboiler duty reduction was observed in the sensitivity analysis performed by L/G ratio, minimum temperature approach, and stripper pressure. Respectively, the lowest reboiler duty at the best conditions of these were found to be 2.8 GJ/t CO2, 2.77 GJ/t CO2 and 2.73 GJ/t CO2 for CESAR, 3.5 GJ/t CO2, 3.45 GJ/t CO2, and 3.43 GJ/t CO2 for MEA. The L/G ratio and the minimum temperature difference were the most significant parameters affecting the cost. At the best L/G ratio, total cost of 460 million € for CESAR, and 544 million € for MEA was obtained. At the best minimum temperature difference, total cost of 502 million € for MEA, and 419 million € for CESAR were found. In every case of sensitivity analysis, CESAR performed better than MEA, and almost at every condition, CESAR design was less costly.